Motion transmitting mechanism



K. H. ANDREN 2,254,766

MOTION TRANSMITTING MECHANISM Filed June 15, 1940 2 Sheets-Sheet 1 r N A ATTORNEY ww wzwnrw P 1941- K. H. ANDREN 2,254,766

MOTION TRANSMITTING MECHANISM Filed June 15, 1940 2 Sheets-Sheet'Z 1 f; m l3 Ham /9' 1 7- 2 g 2/ l6 I. "I 30 23 26 9 2/ I I: In [il|n., i 6 E 1 "LI N" I w flfiz EVENZOR Patented Sept. 2, 1941 SKATES rear or ies 2,254,766 .MOHQN TRANSMITTING monanisn Application June 15, 1940, Serial No. 340,685

19 Claims.

My invention relates in general to improvements in the art of transferring motion from one machine element to another, and relates more specifically to improvements in the construction and operation of mechanism for transmitting movement from a continuously moving member to an intermittently movable member or members.

An object of the present invention is to provide improved mechanism for converting definite movement of one member into similar but interrupted motion of another, and for utilizing the prime mover to positively prevent motion of the other member during periods of rest.

Another object of the invention is to provide simple mechanism for transmitting rotary-intermittent motion from a driver to "a driven element, and for locking the driven element against rotation when the driver is inactive.

A further object of my invention is to provide improved toothed gearing for positively transferring rotary motion from one member to another, so that the latter will be intermittently revolved and will be brought into driving coaction With the former without impact or shock.

Still another object of my present invention is to provide improved power transmitting mechanism which may be utilized'in various types of machines, for imparting rotary movement from a continuously revolving driving element to one or more intermittently revolvable driven elements through coacting teeth associated with there spective elements.

An additional object of the present'invention is to'provide compact and durable means for bringing the teeth of two gears into coaction with each other both gently and smoothly, and for likewise releasing the driving connection between the gears.

These and other objects of the invention will be apparent from the following detailed description. 7

A clear conception of anembodiment of the invention, and of the mode of constructing and of operating a rotary motion transmitting mechanism built in accordance with the improvement, may be had by referring to the drawings accompanying and forming a pa'rt'of this specification wherein like reference characters designate the same or similar parts in the various views. a

Fig. 1 is a top view of a commercial embodiment of the invention, showing the driving el-ement rotating while the driven element is at rest and locked against rotation; 1

Fig. 2 is a fragmentary similar view showing the driven element released for rotation and the cam for initiating rotation thereof in action;

Fig. 3 is another fragmentary similar View showing the driven element being rotated by meshing of its pinionteeth with the driving segment gear;

Fig. 4 is still another fragmentary similar View, showing the position of the driven element immediately after rotation thereof;

Fig. 5 is a' somewhat enlarged fragmentary section through the driving element and an elevation of the driven element, the section being taken along the line 5-5 of Fig. 4;

Fig. 6 is another similarly enlarged elevation of the driven element and of a fragment of the driving element, with a section through the easing taken along the line 6-6 of Fig. 4;

Fig. 7 is a similarly enlarged central section through the driven element, taken along the line 7-7 of Fig. 4;

Fig. 8 is a top view of the driven element roller carrier; and

Fig. 9 is a side view of the roller carrier of Fig. 8.

While the embodiment of the invention specifically illustrated and described herein, discloses a motion transmitting mechanism adapted to impart a half revolution from a continuously rotating driving element to a single intermittently rotatable driven element, twice during each complete revolution of the driver, it is not mydesireor intention to thereby unnecessarily restrict the scope or untility of the improvement,

.: since the mechanism can be readily duplicated so that a single rotating driver will intermittently impart one or more partial or complete revolutions to two or more driven elements.

Referring to the drawings, the improved motion or power transmitting mechanism shown therein, comprises in general, a driving element consisting of a rotary disk-like member ll) secured to a power shaft H by means of a key 12, and having local sets of peripheral gear teeth l3, l3 and intervening peripheral rim sections l4, l4; and a driven element consisting of an upper carrier or bracket It having upper and lower rollers I1, Hljournalled therein for cooperation with the segment rims l4, I4 and alower pinion 19 the teeth 20 of which are adapted to mesh with the teeth l3, i 3, both the'bracket It and the pinion I9 being secured to a driven shaft 2i by means of a'key 22. The power shaft ll may berotated either continuously or intermittently from any suitable power source to correspondingly rotate the member ID, and the driven shaft 2| may be connected to any suitable motion utilizing device such as a wire or cable feeding and stripping carriage; and the shafts II, 2| may be journalled for rotation within a casing 23 to which lubricant may be abundantly admitted so as to insure proper lubrication of the mechanism at all times.

The peripheral rim sections I4, I4 have outer curved surfaces which constitute parts of a common cylindrical surface generated about the axis of the power shaft II, and these sections I4, I4 may be formed integral with or rigidly attached to the member ID by means of screws 24 and keys 25. Each of the rim sections I4, I4 has an upper cam projection 26 at one end, and a similar but reversely disposed lower cam projection 21 at its opposite end, these projections 26, 21 being revolvable in vertically spaced planes and the cylindrical surfaces of the sections I4, I4 extending below the upper projections 26 and above the lower projections 21. Each of the projections 26, 2? has a sloping straight surface cam 28, and a curved opposed surface 29, these surfaces 28, 29 being separated by a short outer surface. The end projections 26, 21 at the adjacent ends of the two sections I4, I4 are separated by approximately semi-circular recesses 30; and the teeth I3, I3 which are formed integral with the member ID, extend across and are located beneath these recesses 30.

The projections 26, 21 may be of similar shape but reversely positioned, and if the projections are so formed, it may be desirable to provide a friction brake on the driven shaft 2| in order to prevent undesirable noise when the rotation of the shaft 2|, pinion 20, and bracket I6 is suddenly and quickly arrested. As previously indicated, the bracket I6 and pinion 20 are rigidly attached to the driven shaft 2|, and the upper and lower rollers II, I8 are journalled for rotation on mutilated pivot pins 3|, 32 respectively, which are rigidly secured to the top and'bottom plates of the :bracket I6 by means of locking plates 33. The plates 33 lock the pins 3|, 32 against rotation and against axial displacement, while permitting ready removal of the pins; and the pins 3| on which the upper rollers I! are journalled, are provided with lower transverse grooves or cut-outs 34 for permitting free passage of the lower projections 21 therethrough, while the pins 32 which rotatably support the lower rollers I8 have upper grooves or cut-outs 35 for permitting free passage of the upper projections 26 therethrough, when the member ID revolves. The rollers Ii are maintained above the cut-outs 34 of the pins 3| by means of ledges 36 formed on the bracket I6, and the other rollers I8 are similarly maintained below the cutouts 35 of the pins 32 by ledges 31; and while both rollers I7, I8 on one of thelonger sides of the bracket I6 are adapted to simultaneously engage either section I4, I4 of the member I0, the upper projections 26 are adapted to engage only the upper rollers 26 whereas the lower projections 21 are adapted to engage only the lower rollers I8.

During normal operation of the improved motion transmitting mechanism, the power shaft I I and member I6 may be rotated in either direction, in order to impart intermittent rotation in the opposite direction to the driven shaft 2|. Assuming that the shaft II and member ID are rotating in a counter-clockwise direction as indicated in Fig. l, and that the rollers I1, I8 at one side of the driven element are coacting with the outer cylindrical surface of the rim section I4. The driven shaft 2| is then locked against possible rotation by virtue of the coaction of the spaced rollers II, I8 with the peripheral surface of the driving element. As the projection 26 nearest the driven element approaches the position shown in Fig. 2, the upper projection 26 will ride freely through the cut-out 35 in the adjacent pin 32, and the curved surface 29 of this projection will eventually attain the position of Fig. 2 and will engage the adjacent roller IT. This engagement of the curved projection surface 29 with the roller I'I takes place before the pinion teeth 20 have engaged the teeth I3 of the driving element, and as the roller I'I rides along the curved surface 29 of the upper projection 26, the driven element will gradually have initial rotation imparted thereto. When the driven element has been thus initially set in motion, the teeth I3 of the driving element are brought into smooth contact with the teeth 20 of the pinion I9, and the shaft 2| is thus positively rotated until the teeth 20 are again removed from contact with the teeth I3. During this rotation of the driven element, the rollers I'I, I8 which are nearest the driving element, will pass freely through the adjacent recess 30 as clearly shown in Fig. 3. The advancing teeth I3 will ultimately leave the teeth 26 of the pinion I9, and during this separation of the driving teeth, one of the lower rollers I8 will engage the curved surface of the adjacent projection 21, as clearly shown in Fig. 4, and will ride along the outer cylindrical surface of the other rim surface l4. Continued rotation of the member I9, will cause the roller IT on the same side of the bracket I6 to subsequently also engage the outer or peripheral surface of the section I4, thereby again locking the driven element against rotation. As the rotation of the member If! continues, the projections 26, 21 and the local teeth I3 on the opposite side of the driving element will become effective and will function in the manner just described, thereby imparting another partial revolution to the driven element. In this manner the driven element will be intermittently partially rotated, twice during each complete revolution of the driving element, and the release of the driven element, the rotation thereof, and the re-locking, are all effected smoothly and without impact. The motion transmission will obviously continue so long as the power shaft II is being rotated, and while the mechanism shown herein is adapted to impart only one-half a revolution to the driven shaft 2| during each intermeshing of the teeth I3, I3 with the pinion teeth 20, the extent of rotation of the driven shaft 2| may obviously be varied by utilizing a lesser or greater number of teeth I3, I3 and rollers I'I, I8 in each local segment. 7

From the foregoing detailed description it will be apparent that my present invention provides a simple, compact, and highly efficient mechanism for transferring rotary motion from a driv ing to a driven element, in such manner that the driven element is intermittently" revolved while being locked against rotation by the driving element during periods of rest. The rollers Il, I8 by virtue of their coaction with the curved surfaces 29 of the projections 26, 21, produce gradual rotation of the driven element andj'srnooth engagement of the gear teeth I3, 29 with each other, Whenever the driven :shaft 2| is being rotated. These rollers Il', |8-moreover positively the teeth l3 and projections2l are not effective, and'the rotary motion of the shaft 2| is efiectively'arrested and the rollers ii, I8 are brought into locking engagement with the sections it, I4 Whenever the engagement of the gear teeth is interrupted. As previously indicated, a single driving element may be utilized to intermittently actuate any desired number of driven elements, and by varying the number of teeth l3, and rollers the degree of rotation of the driven elements may be readily altered. The improvement has proven highly successful in actual commercial use, and may be utilized for many difierent purposesalthough it has been found especially advantageous in the operation of cutting and stripping machinery. It is also noteworthy, that by utilizing a greater number of teeth l3, E3 in one set than in another set associated with the same driving element, the driven element may be rotated difierentamounts as the teeth 25 thereof engage the successive sets of teeth l3, l3, thus making it possible to meet various operating conditions. While the various parts have been described as being disposed in vertical or horizontal position, the improved mechanism will operate equally as well regardless of the disposition of the shafts and elements.

It should be understood that it is not desired to limit this invention to the exact details of construction or to the precise mode of operation of the mechanism, herein shown and described, for various modifications within the scope of the claims may occur to persons skilled in the art.

I claim:

1. In combination, a driving element rotatable about an axis and having peripheral teeth, a driven element having peripheral teeth cooperable with the teeth of said driving element to intermittently rotate said driven element about another axis, and a roller carried by one of said elements and coacting with the periphery of the other to alternately impart initial rotation to and to aid in preventing rotation of said driven element during a portion of each revolution of said driving element.

2. In combination, a driving element rotatable about an axis and having local peripheral teeth and a smooth rim beyond the opposite end teeth,

a driven element having peripheral teeth coop- F erable with the teeth of said driving element so as to intermittently rotate said driven element about another axis, and spaced rollers carried by said driven element and being cooperable with said smooth rim to positively prevent rotation of said driven element when said driving and driven element teeth are out of engagement, one of said rollers also coacting with said driving element to impart initial rotation to said driven element.

3. In combination, a driving element rotatable about an axis and having local peripheral teeth and a smooth rim beyond the opposite end teeth, a driven element having peripheral teeth cooperable with the teeth of said driving element so as to intermittently rotate said driven element about another axis, and spaced rollers carried by said driven element near the teeth thereon and eccentrically of its axis of rotation, said rollers being cooperable with said driving element rim to positively prevent turning of said driven element about its axis when said teeth are out of mesh, and one of said rollers being cooperable with said driving element to impart initial rotation to said driven element.

4. In combination, a rotary driving element prevent the driven shaft 2! from rotating when l having localteeth and cylindrical surfaces adjoining saidteeth, a rotary driven element having teeth cooperable with said driving element teeth to intermittently rotate said driven element, and spaced rollers carried eccentrically of the axis oirotation of said driven element and being cooperable with said surfaces when said teeth are out of mesh to prevent rotation of said driven element, said rollers being cooperable with said driving element to impart periodic initial rotation to said driven element.

5. In combination, a rotary driving element having local teeth and cylindrical surfaces adjoining said teeth, a rotary driven element having teeth cooperable with said driving element teeth to intermittently rotate said driven element, and spaced rollers revolvabl about th axis of said driven element during rotation thereof and being cooperable with said surfaces when said teeth are out of mesh to positively prevent rotation of said driven element, said rollers being cooperable with said driving element to impart initial periodic rotation to said driven element and to arrest the rotation thereof.

6. In combination, a rotary driving element ment adjacent to the end of each of said surfaces for engaging said roller to impart initial rotation to said driven element directly prior to each intermeshing of said teeth.

7. In combination, a rotary driving element having'local teeth and cylindrical surfaces adjoining said teeth, a rotary driven element having teeth cooperable with said driving element teeth to intermittently rotate said driven element, a roller revolvable with and about th axis of rotation of said driven element and being cooperable'with said surfaces to prevent rotation of said driven element, and a projection on said driving element coacting with said roller to impart initial rotation to said driven element.

8. In combination, a rotary driving element having local sets of gear teeth and projections adjoining the ends of said sets, a driven element having gear teeth cooperable with said driving element teeth to intermittently rotate said-driven element, and a set of rollers revolvable with and about the axis of said driven element and coasting with said projections to initially rotate said driven element and to arrest the rotation thereof.

9. In combination, a rotary driving element having local sets of gear teeth and projections adjoining the ends of said sets, a driven element having gear teeth cooperable with said driving element teeth to intermittently rotate said driven element, and a roller revolvable with and about the axis of said driven element and coacting with said projections to initially rotate said driven element, said roller being cooperable with the periphery of said driving element to aid in preventing rotation of said driven element when said teeth are disengaged.

10. In combination, a continuously rotating driving element having sets of local gear teeth and smooth peripheral surfaces between said sets, a driven element having a continuous annular series of gear teeth adapted to coast with said sets in succession to intermittently rotate said driven element, a series of spaced rollers carried by said driven element near the teeth thereof and coacting with said surfaces to prevent rotation of said driven element, and projections on said driving element near said tooth sets and coacting with said rollers to impart initial rotation to said driven element directly preceding each inter-meshing of said teeth.

11. In combination, a continuously rotating driving element having sets of local gear teeth and smooth peripheral surfaces between said sets, a driven element having a continuous annular series of gear teeth adapted to coact with said sets in succession to intermittently rotate said driven element, a series of spaced rollers carried by said driven element near the teeth thereof, and projections on said driving element near said tooth sets and coacting with said rollers to impart initial rotation to said driven element directly preceding each intermeshing of said teeth, two rollers of said series being cooperable with one of said surfaces to prevent rotation of said driven element whenever said teeth are disengaged.

12. In combination, a continuously rotating driving element, a driven element intermittently rotatable at higher speed by said driving element, rollers carried by one of said elements and being revolvable about the axis of rotation thereof, and means carried by the other element and cooperating with said rollers to gradually accelerate and decelerate said driven element at the beginning and end of each driving period, said rollers being cooperable with said driving element to prevent rotation of said driven element during interims between said driving periods.

13. In combination, a rotary driving element, a driven element intermittently rotatable by said driving element, and rollers carried by and being revolvable about the axis of rotation of said \lriven element, said rollers being alternately cooperable with said driving element to gradually accelerate said driven element at the beginning of each driving period and to prevent rotation of said driven element during interims between said driving periods.

14. In combination, a rotary driving element, a driven element intermittently rotatable by said driving element, and rollers carried by and being revolvable about the axis of rotation of said driven element, said rollers being alternately cooperable with said driving element to gradually decelerate said driven element at the end of each driving period and to prevent rotation of said driven element during interims between said driving periods.

15. In combination, a rotary driving element, a driven element intermittently rotatable by said driving element, and rollers carried by and being revolvable about the axis of rotation of said driven element, said rollers being successively cooperable with said driving element to first gradually accelerate said driven element at the beginning of each driving period, to then gradually decelerate said driven element at the end of each drivin period, and to thereafter prevent rotation of said driven element during the interim following said driving period.

16. In combination, a rotary driving element having a local series of gear teeth and a smooth peripheral surface between the opposite ends of said series, a driven pinion having teeth adapted to mesh with said gear teeth to intermittently rotate the pinion, a series of rollers carried by said pinion near the teeth thereof, and means carried by said driving element near said gear teeth and coacting with said rollers to impart initial rotation to said pinion directly preceding each intermeshing of said teeth, two rollers of said series being cooperable with said surface to prevent rotation of said pinion when said teeth are disengaged.

17. In combination, a rotary driving element having a local series of gear teeth and a smooth peripheral surface between the opposite ends of said series, a driven pinion having teeth adapted to mesh with said gear teeth to intermittently rotate the pinion, a series of rollers carried by said pinion near the teeth thereof, and a projection on said driving element in advance of said gear tooth series and coacting with said rollers to impart initial rotation to said pinion directly preceding each intermeshing of said teeth, several rollers of said series being cooperable with said surface to prevent rotation of said pinion when said teeth are disengaged.

18. In combination, a rotary driving element having a local series of gear teeth and a smooth peripheral surface between the opposite ends of said series, a driven pinion having teeth adapted to mesh with said gear teeth to intremittently rotate the pinion, a series of rollers carried by said pinion near the teeth thereof, and a projection on said driving element at the trailing end of said gear tooth series and coacting with said rollers to gradually stop said pinion directly following each intermeshing of said teeth, several rollers of said series being cooperable with said surface to prevent rotation of said pinion when said teeth are disengaged.

19. In combination, a mutilated driving gear having a local set of teeth and a smooth peripheral surface between the opposite ends of said set, a driven pinion having teeth adapted to mesh with said gear teeth to periodically rotate the pinion, a series of rollers carried by said pinion, and projections on said gear near the opposite ends of said tooth set, said rollers being cooperable with said projections to accelerate and decelerate said pinion and also being cooperable with said surface to prevent rotation of the pinion when said gear and pinion teeth are out of mesh.

KARL H. ANDREN. 

